Superheated-steam boiler



E R. FISH.

SUPERHEATED STEAM BOILER.

APPLICATION FILED APR. i, 1919v 1,390,771. PatentedSept. 13,1921.

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ESUPERHEATED STEAM BOILER.

APPLHIATIUN TILED APR. M \EHE,

1,390,771 V PatenteeiS/ept. 13, 1921,

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rlJPEHHtATED STEAM BOILER.

APPLICATION FILED APR. M 1919.

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E. R. FISH.

SUPERHEATED STEAM BOILER.

APPLICATION FILED APR. 1. 1919.

1,390,771 O PatentedSept. 13, 1921.

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Application filed April 1,

To all whom it may concern Be it known that I, Enwaaos RUssnLL FIsH, a citizen of the United States, residing at Phoenixville, in the county of Chester and State of Pennsylvania, have invented certain new and useful Improvements in Su erheated-Steam Boilers, of which the fol owing is a specification.

It is well known that boilers, due to the necessit of economizing space and in order to facilitate the firing and other attention thereto, are often positioned close together. This renders it articularly difficult to clean, repair and rep ace superheater.tubes, especially when the tubes extend transversely to the depth of the boiler and therefore must necessarily be either cleaned, re aired or replaced from the side of the boi er. In view of the above mentioned difficulties many boilers have been constructed in which superheater extends from the front or into the top of'the boiler.

One of the objects of my invention is to provide an efliciently c erative superheated steam boiler in which t e superheater tubes extend transversely to the depth of the boiler, and as illustrated in the accompanying drawings transversely between the water tubes thereof, and at the same time to so construct my boiler that the superheater tubes can be easily cleaned, repaired or replaced even though there is comparatively ittle room at the side of the boiler. Thus boilers constructed in accordance with my invention can be placed comparativel close together and the arrangement is suc that even though the boilers are closely ositioned the superheater tubes can be quickly and easily inserted, repaired, cleaned and replaced.

Another object is to so construct my invention that a free circulation of the superheated steam will 7 be permitted.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference bei had to the accompanying drawings in w ich- Figure 1 is a longitudinal sectional elevation of a superheated steam boiler of the water tube type made in accordance with my invention; said section being taken on the line 1-1 of Fig. 2,

Fig. 2 is a transversesectional elevation taken on the line 2-2 of Fig. 1,

Fig. 3 is an elevation of the side of my specification of Letters Patent. Patented Sept. 13, 1921.

1919. Serial No. aaaacc.

improved boiler looking in the direction of the arrow .90 in Fig. 2,

Fi 4 is a sectional pian view taken on the line 4-4 of Fig. i,

Fig. 5 is a fragmentary section showin one of the superheater tubes disconnected from the inlet superheater header; the hand hole plates also being omitted from the inlet header and. the outlet header, and

Fig. 6 is a view of similar nature to that shown in Fig. 2 showing hair pin superheater tubes instead. of the continuous straight lengths shown in Figs. 1 and 4 inclusive.

Referrin particularly to Figs. 1 to 5 inclusive of t 1e drawings, 7 represents a boiler casin having front and rear walls 8 and 9 an side walls M and ii. Water tubes 12 are arranged. in superimposed rows and incline rearwardly from the front wall 8. These water tubes 12 are connected at their front and rear ends by boa headers 13 and 14 respectively. in the construction shown, the header 13 is supported by the front wall 8, while the header M- is supported by the rear wall 9, as cleariy shown in Fig. 1. A steam and water drum 15 is positioned in the forward part of the boiler immediately above the beach of water tubes 12.

This steam and water drum has a nip 1e connection 16 with the top of the box hea er -13 and is also connected by tubes 17 with the top of the rear box header 14. A fire box 18 is provided in the front of the boiler below the water tubes 12, and the products of combustion arising from "the fire box 18 pass upwardly between the water tubes 12 and finally pass out of a flue W.

In order to cause the products of combustion to efiiciently give of their heat to the water tubes 12, halides 20, 21 and 22 are positioned within the height of the bank of water tubes 12 and spaced apart so as to compel the products of combustion to wend their way in aserpentine path longitudinally and upwardly between the water tubes prior to passing to the flue 19. The arrows in the interior of the boiler, as shown in Fig. 1 illustrate the course which the roducts of combustion are com elled to ta e so as to efficiently give oft eir heat as above de-' scribed.

The water tubes 12 are so arranged, as clearly shown in Figs. 1 and 2, that a space 23 is rovided within the height of the bank nd 0. side wall 11 of the b iler has an opening or slot 24 in direct alinement with the space 23, as clearly shown in Figs. 2 and 3. A flanged cover 25 forms a closure for the opening 24 so as to prevent air from passing from the atmosphere into the interior of the boiler. .This .cover 25 provides a chamber 26 which communicates with the opening 24 and within this chamber is positioned two superheater headers 27 and 28. These headers 2'7 and 28, as illustrated are made of large tubes which are flattened between their endsand are spaced apart so as toprovide a passageway 29 which is alinement with the space 23 and opening 24. The headers 27 and 28 incline rearwardly in the direction of incline of the water tubes 12, space 23 and opening 24.

The side wall 10 is also provided with an opening or slot 30 which is in direct alinement with the space 23 and is normally closed by a flanged cover 31, said flanged cover providing a chamber 32 for asuperheater return header 33. Two sets 34 and 35 of superheater tubes extend transversely through the space 23 and openings 24 and 30 in the side walls 10 and 11 respectively. The set 34 of superheater tubes is positioned above the set 35. The superheater tubes of the set 34 are curved upwardly at one end and are expanded within the header 27. The opposite ends of the tubes 34 are expanded within the return header 33. The superheater tubes of the set 35 at one end are curved downwardly and are expanded within the header 28. The opposite ends of the tubes 35 are expanded within the return header 33.. By spacing the headers 27 and 28 apart and curving the superheater tubes of the sets 34 and 35, access to the tubes may be had through the passage 29 so that if "it is desired to cut the tubes plenty of working space is provided. The lower end of the superheater header 28 is connected by a pipe 36 with the steam and water drum 15 so that the steam to be superheated enters the superheater header 28 at its lowest end and passes through the superheater tubes 35 into the return header 33 and then through the uppermost superheater tubes 34 into the header 27; said latter header being provided with an outlet coupling 37. The init let header 28, outlet header 27 and return header 33 are all provided with hand holes 38 in alinement with the adjacent ends of the superheater tubes 34 and 35 and these hand holes are normally closed by hand hole plates 39. a

The opening 24 in the side wall 11 extends, as shown at 24, beyond the foremost superheater tubes and into close proximity to the front wall of the boiler casing. I am'thus enabled to insert or remove the superheater tubes 34 and 35 at an angle, as

shown in dot and dash lines at y in Figs. 3 and 4. After the tubes have been time inserted through the opening 24 into the space 23 they can be swung so as to extend directly transverse, or in other words at right angles to the water tubes, and afterward attached to their respective headers. In view of the fact that I can insert or remove the superheater tubes at an incline through the opening 24, it is possible to easily insert or remove the superheater tubes even though there is another boiler positioned close to the side wall 11. Also, since the extension 24 of the opening 24 is forward of the headers 27 and 28, the cover plate portion which closes said extending portion 24" can be made narrower, as indicated by the dotted lines at 40, in Fig. 1.

It will thus be understood that by the construction above described the superheater tubes can be easily swung into position by first inserting them at an angle, as shown b the dot and dash line position at y in igs. 3 and 4 and then afterward swinging them so as to extend at right angles or directly transverse to the water tubes 12. I

In the. form of my invention shown in Fig. 6 the construction is substantially similar to that described in connection to Figs. 1 to 5 inclusive with the exception that instead of providing separate sets of super-' heater tubes and a return header I substitute, in lieu of the se arate sets of tubes, tubes 41 of the hair pm type which form their own return. In all respects, the construction is similar to that described in connection with Figs. 1 to 5 inclusive and I have therefore given corresponding parts similar reference numerals. It will be understood that the opposite ends of the hair pin superheater tubes 41 are expanded into the superheater headers 27 and 28 so that the steam to be superheated enters the superheater tubes through the header 28 and then passes through the superheater tubes into the header 27. The tubes 41 can be inserted at-an agle from the opening 24 and afterward turned into a position transversely to the water tubes. It will be further understood that if it is desired to remove any of the 'hair pin type superheater tubes 41 that their ends can be cut and then the tubes can be removed by first taming them at an angle So as to pass out of the opening 24.

The boiler illustratedin the drawings is shown comparatively wide, or in other words wider than boilers of this type are generally formed. However, even though exceptional wide boilers are to be supplied with superheater tubes extending entirely therethrough, such for example as shown in Figs. 1 to 5 inclusive, they can be inserted or removed in accordance with my invention as above described.

While I have described my invention as taking a particular form, it will be understood hat the vari s par s of my n ention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is p 1. A superheated steam boiler including a casing having an opening in its side extending in the direction of the depth thereof; superheater headers spaced one above the other and having an open space therebetween in alinement with said opening, said headers extending in the direction of the de th of the boiler adjacent said side thereo and superheater tubes connected to said headers and extending into said casing through said opening transversely to the depth thereof, said superheater tubes adjacent their points of connection with the res ective headers be ing bent at diverging ang es and joining 0 posed slanting portions of said headers, said opening being of sufficient length in the direction of the depth of the boiler to ermit tubes when detached from said hea ers to be removed at a slant between the headers in the plane of and outward through said opening into a comparatively narrow space adjacent said side of the casing; substantially as described. k

2. A superheated steam boiler including a casing havin an opening in its side extending in the t lirection of the depth thereof; and su rheater tubes extending into said casing 1n line with said opening transversely to opening including a portion in alinement, in the direction of the depth of the boiler, with the remaining part of said 0 ening, said portion of the opening bein located beyond the zone normally occu ie by said superheater tubes whereby the atter can be removed through the medium of said extended portion of the opening at a slant to the depth of the casing so as to be capable of ermitting said superheater tubes to be wit drawn into a space adjacent to said side of the casing, narrower than the length of said superheater tubes; substantially as described.

3. A superheated steam boiler including a casing having an elongated opening in its side extending in the direction of the de th thereof; steam generating elements wit in said casing including a bank of superimposed rows of water tubes which extend in the direction of the depth of the casing; and superheater tubes extending into said casing in line with said openingesransversely between rows of said water tu said opening having a portion in alinement, in the direction of the depth of the boiler, with the remaining part of said openlng, said portion the depth of said casing, saidof the opening being located beyond the zone normally occupied by said superheater tubes whereby the latter can be removed through the medium of said extended portion of the opening at a slant to the depth of the casing so as to be capable of permitting said superheater tubes to be withdrawn into a space, adjacent to said side of the casing, narrower than the len h of said superheater tubes; substantia 1y as described.

4. A superheated steam boiler including a casing having an opening in its side extending in the direction of the depth thereof; superheater tubes extending into said casin through said opening transversely to the epth of said casing, said opening including a portion extending in the direction of the depth of said casing and located in line with the other part of the opening beyond the zone normally occupied by said superheater tubes whereby the latter can be removed through the medium of said extended portion of the opening at a slant to the depth of the. casing so as to be capable of permitting said superheater tubes to be wit drawn into a space, adjacent to said side of the casing, narrower than the length of said superheater tubes; substantially as described.

5. A superheated steam boiler including a casing having an opening in its side extending in the direction ofthe depth thereof; superheater headers spaced one above the other and having an open s ace therebetween in alinement with sai opening said headers extending in the direction oi the depth of the boiler adacent said side thereo and superheater tu s connected to said headers and extending into said casing through said opening transversely to the depth thereof, said opening being of suflicient length in the direction of the depth of the boiler to permit tubes when detached from said headers to be removed at a slant between the headers in the plane of and outward through said opening into a comparatively narrow space adjacent said side of the casing, said si e of the boiler including a chamber provided b a flanged cover forming a closure for the superheater headers and said opening, said cover being seated on said side wall; substantially as described.

6. A superheated steam boiler including a casing havin an opening in its side extending in the %irection of the depth thereof superheater headers spaced apart to provide a space therebetween in the plane of said opening, said headers extending in the direction of the depth of the boiler ad'acent the side thereof and having lateral oles; single loop hair pin shape superheater tubes having ends extending throughsaid holes and expanded in said headers, said tubes extending into said casing through said opera ing transversely to the depth thereof, said headers having hand holes opposed to said first holes; and readily detachable means for closing said hand holes, said opening being of suflicient length in the direction of the depth of the boiler to allow said tubes when detached from said headers to be removed at a slant through said openin in the plane of the space between the hea ers into a comparatively narrow space at said side of the casing; substantially as de- 10 scribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWARDS RUSSELL FISH.

Witnesses:

S. H. UMSTAD FRANCIS J. Oli'mnn. 

